The power to use incredibly dense muscle as armor. Combination of Dermal Armor and Muscle Mass Enhancement. Not to be confused with Skin Hardening.

Also Called

  • Armored Muscle
  • Defensive Muscle
  • Muscle Defense
  • Rough Muscle
  • Tekkai (One Piece)


The user's muscles are so dense and bulky, that that they can use it to cause physical attacks to bounce off of their muscles. Since the muscles are directly under one's skin, the bulk can be used to protect one's bones and innards. By bulking the muscles at point of contact, the user can even bounce the attack back.




  • Areas with less muscle concentration may be less protected.
  • Areas with no muscle concentration are not protected.
  • Does not protect the outer skin, so scratches and flays on that is still possible.
  • If attacks gets into body, then muscles cannot protect.
  • May require user to consciously bulk up muscles to block attacks.
  • Muscles are still part of one's flesh body, and are vulnerable to damages not of pure brute force (burning, freezing and electrifying).

Known Users


  • Yujiro Hanma (Baki the Grappler)
  • Gyanza Rujike (Black Cat)
  • Ouma Kurogane (Chivalry of A Failed Knight)
  • Crystabel (From Commonplace to the Worlds Strongest)
  • Akisame Kōetsuji (Kenichi The Mightiest Disciple)
  • Balke (Luger Code 1951); via his werewolf form
  • Muscular (My Hero Academia)
  • Tekkai Users (One Piece)
  • Monkey D. Luffy (One Piece); via Gear Fourth - Bounce Man
  • Superalloy Darkshine (One-Punch Man)
  • Younger Toguro (Yu Yu Hakusho)

Video Games


  • Hulk (Marvel Comics)
  • Slade Wilson/Deathstroke (DC Comics)
  • Hercules Method Practitioners (The Strange Talent of Luther Strode)
    • Cain
    • The Librarian
    • The Binder
    • Jack the Ripper
    • Luther Strode


  • Vaxasaurian (Ben 10 Series)
  • Ultimate Kevin

Known Objects


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